body{
  margin:0;font-family:Arial,sans-serif;background:#eef2f6;
}
.card{
  max-width:680px;margin:100px auto;padding:40px;text-align:center;
  background:white;border-radius:16px;box-shadow:0 8px 30px rgba(0,0,0,.08);
}
h1{color:#07c160}
button{
  background:#07c160;color:white;border:0;padding:10px 18px;
  border-radius:8px;cursor:pointer;
}